Air filter


New member
Currently i run a KN filter which i oil and then slip a dry outerwear over it. My question is when running a outerwear you still need to oil the filter which its covering right? And if i run a foam prefilter which is oiled do i still need to oil the filter underneath?
Always oil your pleated filter (if it is not an oil-less design of course.)
Oil your foam filter if you are using one.
The Outerwears (polyester-type) cover does not get oiled.

Generally you run EITHER the foam pre-filter OR the Outerwears pre-filter.
Exception would be a terribly dusty environment.

Also be aware that there are different types of air filter oils:
one for foam and one for pleated (paper/cotton.)

🏁Thanks and God bless,
Brian Carlson
Carlson Racing Engines
Vector Cutz
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31 years of service to the karting industry
Linden, IN